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EVALUATION AND PREDICTION OF THE TENSIL PROPERTIES OF ASPHALT-TREATED MATERIALS

THIS REPORT DESCRIBES A STUDY WHICH WAS UNDERTAKEN TO EVALUATE THE EFFECTS OF SEVEN FACTORS ON THE TENSILE PROPERTIES OF ASPHALT-TREATED MATERIALS. THE SEVEN FACTORS INVESTIGATED WERE AGGREGATE TYPE, AGGREGATE GRADATION, ASPHALT CEMENT TYPE, ASPHALT CONTENT, MIXING TEMPERATURE, COMPACTION TEMPERATURE, AND CURING TEMPERATURE. THE TEST RESPONSES DISCUSSED ARE ELASTIC TENSILE STRAIN, MODULUS OF ELASTICITY, POISSON'S RATIO, TOTAL TENSILE STRAIN, AND TENSILE STRENGTH. THE RESULTS OF ANALYSIS OF VARIANCE ARE INCLUDED IN THE REPORT AND INDICATE THE SIGNIFICANT MAIN EFFECTS, INTERACTIONS, AND QUADRATIC EFFECTS (NON-LINEAR) FOR EACH OF THE TEST RESPONSES. REGRESSION ANALYSES WERE CONDUCTED ON THOSE MAIN EFFECTS AND INTERACTIONS WHICH WERE CONSIDERED TO BE OF PRACTICAL ENGINEERING SIGNIFICANCE TO OBTAIN PREDICTION EQUATIONS FOR MODULUS OF ELASTICITY, POISSON'S RATION, TENSILE STRENGTH, AND TENSILE STRAINS IN TERMS OF THE SEVEN INDEPENDENT VARIABLES. THESE PREDICTION EQUATIONS WERE USED TO ESTIMATE VALUES OF THE MATERIAL CHARACTERIZATION CONSTANTS FOR A VARIETY OF LEVELS OF THE SEVEN INDEPENDENT VARIABLES. THE ESTIMATED VALUES ARE PRESENTED IN TABULAR FORM AND IN SETS OF CURVES WHICH CAN BE USED TO READILY OBTAIN ESTIMATES OF MODULUS OF ELASTICITY, POISSON'S RATIO, TENSILE STRENGTH, AND FAILURE STRAINS FOR A VARIETY OF ASPHALT-TREATED MATERIALS.